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By using standard AT command, u may consider to use +CLCC to check the call state. For example, u can start the count when the call is connected, and stop when the call is IDLE. However, it is required to POLL the call state in a "certain" interval repeatedly.
There is no standard AT command defined in GSM/3GPP spec for call duration. In case, your modem provides a proprietary AT command. I think you have to count by yourself.
msm6280 datasheet chipset
Hello,
I would like to find the detail datasheet of MSM6275 and MSM6280, any one got it? :D
thanks in advance.
**broken link removed**
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